Arrangement for adjusting the control edges of a follow-up piston system

摘要

The arrangement relates to an arrangement for adjusting the control edges of a follow-up piston system, with a pilot piston rotatable in the main control piston and having sloping control edges, the main control piston being axially displaceable but not freely rotatable, while the pilot piston is axially fixed and can be rotated, for example, via a stepping motor. Both the pilot piston and the main control piston are centred in a spring-loaded manner. To adjust the position of the control edges with regard to the two centring arrangements, a lever with a radial slot, elongated hole or fork, with which a pin eccentrically rotatable in the housing interacts, is fastened to the follow-up or main control piston.